code: def _command(
      self,
      environment,
      code_package_url,
      step_name,
      step_cmds,
      task_spec,
  ):
      mflog_expr = export_mflog_env_vars(
          datastore_type="s3",
          stdout_path=STDOUT_PATH,
          stderr_path=STDERR_PATH,
          **task_spec,
      )
      init_cmds = environment.get_package_commands(
          code_package_url, "s3"
      )
      init_expr = " && ".join(init_cmds)
      step_expr = bash_capture_logs(
          " && ".join(
              environment.bootstrap_commands(step_name, "s3")
              + step_cmds
          )
      )
  
      # construct an entry point that
      # 1) initializes the mflog environment (mflog_expr)
      # 2) bootstraps a metaflow environment (init_expr)
      # 3) executes a task (step_expr)
  
      # the `true` command is to make sure that the generated command
      # plays well with docker containers which have entrypoint set as
      # eval $@
      cmd_str = "true && mkdir -p %s && %s && %s && %s; " % (
          LOGS_DIR,
          mflog_expr,
          init_expr,
          step_expr,
      )
      # after the task has finished, we save its exit code (fail/success)
      # and persist the final logs. The whole entrypoint should exit
      # with the exit code (c) of the task.
      #
      # Note that if step_expr OOMs, this tail expression is never executed.
      # We lose the last logs in this scenario (although they are visible
      # still through AWS CloudWatch console).
      cmd_str += "c=$?; %s; exit $c" % BASH_SAVE_LOGS
      return shlex.split('bash -c "%s"' % cmd_str)
  
imports: import atexit
  import copy
  import json
  import os
  import select
  import shlex
  import time
  from metaflow import util
  from metaflow.plugins.datatools.s3.s3tail import S3Tail
  from metaflow.plugins.aws.aws_utils import sanitize_batch_tag
  from metaflow.exception import MetaflowException
  from metaflow.metaflow_config import SERVICE_INTERNAL_URL, DATATOOLS_S3ROOT, DATASTORE_SYSROOT_S3, DEFAULT_METADATA, SERVICE_HEADERS, BATCH_EMIT_TAGS, CARD_S3ROOT, S3_ENDPOINT_URL, DEFAULT_SECRETS_BACKEND_TYPE, AWS_SECRETS_MANAGER_DEFAULT_REGION, S3_SERVER_SIDE_ENCRYPTION
  from metaflow.metaflow_config_funcs import config_values
  from metaflow.mflog import export_mflog_env_vars, bash_capture_logs, tail_logs, BASH_SAVE_LOGS
  from .batch_client import BatchClient
label_desc: Use image node_id 2 for calling the Batch obj's underlying member method code with example usage: obj._command(environment, code_package_url, step_name, step_cmds, task_spec) and returns: shlex